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(ModeL) P. STITZEL.

ROTARY WATER METER.

Patented Apr 15, 1884.

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FREDERICK STITZEL, OF LOUISVILLE, KENTUCKY, ASSIGNOR OF ONE-HALF TO ADOLPH REUTLINGER, OF SAME PLACE.

ROTARYVVATER-l'tl ETER.

SPECIFICATION forming part of Letters Patent No. 297,092., dated April 15, 1884:.

(ModeL) To all whom it may concern Be it known that I, FREDERICK S'rirznL, a citizen of the United States, residing at Louis ville, in the county of Jefferson and State of '5 Kentucky, have invented certain new and useful Improvements in Rotary \Vatenllleters, of which the following is a full, clear, and exactdescription.

This invention is in the nature of a pressare liquid-meter; and the object of the invention is to obtain a simple, compact and reli able mechanism for measuring and registering the quantity ofliquidsay, waterconsum ed at a given place, the operation of the mechan- 1 ism being controlled entirely by the draw-off cocks at the point or place of use or consump tion.

.Theinvention consists, as hereinafter specitied and claimed, of a cylindrical casihgyhav- 2o ing tubular bosses, and containing an inlet andan outlet. combined with an inclosed rotary piston, divided centrally into two chambers, provided with ports, and communicating with an annular water-way between the periphery of the piston and the cylinder, a recessed hub for the piston, its shaft boxed in said bosses, and with gravitating valves, the two piston'chambers being separate and independent, whereby the water enters one of 0 the piston-chambers, and is by it discharged into the cylinders waterway, whence it is taken through the port of the other pistonchamber and discharged into the service-pipe or delivery medium. The capacity of the watcr-way being known, and it being filled and View, partly in section, of the piston removed, and Fig. 4 is a bottom plan view of said piston, with the packing removed from its Lead to show the grooves therein.

The casing 61, which I will hereinafter designate a cylinder, is composed of an annular rim, with heads 6 b bolted thereto watertight. These heads are provided centrally with tubular closed bosses c c, which serve as boxes to receive-and contain water-tight the shaft (1 of the piston c. Tubes ff, opening through the heads I) 1) into the cylinder, project from said heads below the shaft-boxes, and one of such tubes-say, f-constitutes the inlet, and the other,f, the outlet, tubefbe- 6o ing connected, say, with the main, and tubef with the service-pipe of a water-supply system. The piston c has a recessed hub, 9, whereby it is fitted tightly to and rotates the shaft d,- and said piston is divided by a cen- 65 tral partition h, into two chambers 2' 2', which are entirely separated and non-communicating. It is also provided with a'pist01'1head,j.' The chamber 2 is in communication, through the recessed hub and port or inletj, with the inductiontubef; and the chamber 41 is in communication with the outlet or discharge tube f, through the other end of the recessed hub,

and the port or outlet j.

Between the piston and the cylinder is an annular water-way, k, divided by gravitating valves ZZ, arranged in boxes at m on the casing, and seating on the piston. The chamber i communicates with this water-way through the port a in the piston-head, whereby said waterway is supplied with the liquid to be measured; and the chamber t" is in separate and independent communication with the water-way through the port 0 on the other side of and just below the piston-head. The piston 8 5 and piston-head are fitted water-tight in the cylinder by the packin gs p q r s, the packingsp and q being rings arranged in grooves on the faces of the piston, and the packings r ands being strips set in grooves in the head j to fit it watertight in the water-way 7c. The faces of the piston are provided with tubes t, extending from one to another transversely of the piston, and with depressions it, whereby leakage is compensated for to obtain an equilibrium of pressure. The head of the piston is compensated for as to weight in the casting or making of the piston, so as to obviate a deadcenter.

The operation is as follows: Tater flows [00 ing said way up to the under side of the valve onlybe rotated about twcnty-five times a min- Zexerts a pressure against the head, which, with the momentum of the inflowing water, will drive the piston to the right, which will effect the rotation of the piston so long as there is a head of water and an exhaust. Port 0, being the exhaust-port and in advance of the induction-port a, discharges the air in the water-way It before the valve Z, and then passing underthe said valve also exhausts there. The moment the port 0 has passed valve Z the curvilinear face of the piston-head comes into contact with valve Z, raises it, and passes beneath and beyond it, the said valve Z being again seated against the piston by gravitation. The raising and passing of valve Z was done without pressure on either side thereof, as port 0 had already passed before and behind or beyond it before the piston-head came in contact and the port 0 passes under and beyond it.

The moment the edge of port 0 is beyond valve Z the pressure is thrown from the lower surface of said valve to the top surface of valve'l'. The water-way is now completely filled with water, except what is displaced by its. contents of mechanism, and remains so as long as there is a water head or supply. As port 0 now exhausts or educts the water it is drawn off by the service-cocks. Port a will induct the same quantity as that discharged. The piston, continuing its rotation and port 0 its eduction, said port will pass under and beyond valve Z, thereby throwing the pressure on the lower surface of valve Z. Thepiston-head then again raises valve Z and passesundcr and beyond it. Port 0 next passes under and beyond the valve Z, whereby the pressure is thrown from the lower surface ofZ to the top surface of valve Z, and so 011 continuously. The valve Z holds the pressure until the valve Z has been raised and passed by the piston-head, and so, similarly, the valve Z holds the pressure until valve Z has been so operated. These yalves work in the boxes on m, as stated, and said boxes may be merely grooves dressed in thickened. parts of the heads of the cylinder. The port 0 always empties or exhausts the water-way or cylinder in advance of the raising of the valves by the pistonhead, and there is thus absolutely no dead-center or diminished-pressure area in the meter. As the piston will usually utc, the valves have plenty of time to'seat. The head and piston are balanced simply to wear longer, and an unbalanced piston will rotate and measure quite as well.

I have not shown any registering mechanism, as its application to the shaft d is obvious. I may, however, say that the register of any approved pattern may be inclosed in a glass-faced extension of one of the boxes 0, or may be attached thereto, and a connection with the shaft-(Z made by a very small needlelike shaft extended water-tight through said box.

In aconcurrent application, Serial No. 101,747, I have shown the principles of this invention applied to a rotary steam-engine, and therefore do not herein claim the subjectmatter of the-invention therein claimed.

What I claim is 1. In a water-meter, the combination, substantially as shownand described, of a cylinder, an inclosed concentric rotary piston divided into two separate noucommunieating chambers, amiter-way between the piston and cylinder, a head on such piston fitted watertight in said waterway, valves in said waterway seated on the piston and operated by the piston-head for opening, and by gravity for closing, a shaft for the piston, tubular water-' tight bosses forming boxes for said shaft, the recessed hub of the piston fitted to said shaft, and an inlet and outlet communicating with said chambers through the recessed hub, substantially as and for the purpose described.

2. The piston divided into two non-communicating chambers, provided with ports independent of one another, an inlet and an out let for each of said chambers, a recessed hub, through which the supply is introduced and the exhaust discharged, a cylinder and tubular bosses in which said piston and its shaft are inclosed water-tight, awater-way between the cylinder and piston, in which the pistonhead is rotated water-tight, and with which the piston-chamber ports communicate, and paekings for securing the piston water-tight within the cylinder, substantially as set forth.

In testimony whereof I have hereunto set my hand this 21st day of July, A. D. 1883.

FREDERICK STITZEL. \Vitnesses:

J. C. Dawns, GEO. II. IRWIN. 

